The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 12, 1991
Filed:
Oct. 05, 1989
John R Kinghorn, Ashtead, GB;
U.S. Philips Corporation, New York, NY (US);
Abstract
In a teletext decoder, the digital codes for a requested page are acquired and stored in the page memory each time the page occurs in the recurrent teletext transmission cycle. This means that the stored digital codes are over-written in the page memory on each occurrence of the page. Where an acquired digital code has been changed for a different code in the decoder so as to display a special character, this different code has hitherto been over-written periodically by the original code, giving rise to a flicker in the display at the character position concerned. The present invention prevents this flicker by arranging the decoder to look at each stored digital code before it is over-written, and preventing the over-writing from occurring when the digital code pertains to a special character.